In-depth understanding of the second chapter of computer system reading notes and the representation and processing of information

This chapter reads, well, how do you feel about it?

Just read it, did not think the first chapter, there are specific some of the harvest or something. may be not very serious to read. Read in a hurry, some of the content is very obscure and difficult to understand ...

In any case, write your own harvest.

This chapter is about the presentation and processing of information,

How is the information represented in the system? is to store them in bytes. Information is a bit + context (in the first chapter)

How is the specific information expressed?

Signed integers, unsigned integers, floating-point numbers, and so on.

1-bit arithmetic

SHIFT, Shift right

X>>k

is divided into two forms

(1) Logically, the right shift is the addition of K 0 [an-1,an-2,..... A0] shift to the left end to [0,0,0,0,0,..... an-1,an-2,.... AK]

(2) Arithmetic, the right shift is to add k the most significant bit on the left side, [An-1,an-2,..... A0] shifted to [an-1,an-1,an-1,an-1,..... an-1,an-2,.... AK]

General shifts are arithmetic shifts.

2 floating point

Floating-point numbers indicate that because of the validity of the position, the computer generally does not represent the floating-point number accurately, but the near-definite expression

The rounding rules for floating-point numbers are rounded to an even number (Round-to-even), or rounded to the nearest value (Round-to-nearest).

3 Note overflow

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That's all, and you'll have to read this chapter a bit later.

In-depth understanding of the second chapter of computer system reading notes and the representation and processing of information